China inducts American system of insurance agent in 1990’s.In America，the relationship between insurance agent and insurance company was known as principal-agent relationship，but this relationship in China had been changed.The relationship between insurance agent and insurance company in China includes three theories：principal-agent relationship，labor relationship in fact，and work contract relationship.author analyses all three theories，and protests that Chinese actual system includes Principal-agent relationship and labor relationship in fact.Because this system includes labor relationship in fact，so，after the law of labor contract putting in practice，result will be disadvantageous to insurance company.For changing this disadvantage，law should affirms this mixed relationship，or establishes labor relationship between insurance agent and insurance company.